Line drain grate



FIG. 1 is a perspective view of a line drain grate embodying my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof, the opposing side view being a mirror image thereof; and,

FIG. 4 is an end view thereof, the opposing end view being a mirror image thereof.

The broken lines shown in the figures depict portions of the line drain grate that form no part of the claim. 

CLAIM The ornamental design for a line drain grate, as shown and described. 